Invariant Mass of Higgs (MC simulated events)
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Determined the invariant mass of the reconstructed Higgs boson in the MC simulated events from its two b jets, and its two c jets (from the decay mode of H → c cbar). Suitable Gaussian fits were applied to the invariant mass distributions to find the peak for these decay modes, with suitable errors quantified.
Attached plots:
H → b bbar with Gaussian fit
H → c cbar with Gaussian fit
Project Plan
The aim is to now implement a neural network flavour tagging processor to separate background and signal events, and to find how well the reconstructed particles compare with the “true” underlying particles. I will move on to look at the WW fusion process at a higher centre-of-mass energy and aim to construct a full Higgs cross-section analysis.
Steps:
- Reconstruct H->bb using truth tagging in ZH
- Implement "real" b-tagging and do the same
- Switch to WW fusion and find the H->bb peak there
- Make a WW->H->bb cross-section measurement
Useful Links
META FILEATTACHMENT |
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META FILEATTACHMENT |
attachment="c_jet_mass50000.ps" attr="" comment="c jet mass from 50000 events" date="1359744056" name="c_jet_mass50000.ps" path="c_jet_mass50000.ps" size="9218" stream="c_jet_mass50000.ps" tmpFilename="/usr/tmp/CGItemp22600" user="GavinMurdoch" version="1" |
META FILEATTACHMENT |
attachment="plot_gaus_limits_100_147.png" attr="" comment="Invariant Mass of Higgs (H->bb)" date="1360756154" name="plot_gaus_limits_100_147.png" path="plot_gaus_limits_100_147.png" size="24038" stream="plot_gaus_limits_100_147.png" tmpFilename="/usr/tmp/CGItemp29290" user="GavinMurdoch" version="1" |
META FILEATTACHMENT |
attachment="cplot_gaus_limits_105_154.png" attr="" comment="Invariant Mass of Higgs (H->cc)" date="1360756217" name="cplot_gaus_limits_105_154.png" path="cplot_gaus_limits_105_154.png" size="20400" stream="cplot_gaus_limits_105_154.png" tmpFilename="/usr/tmp/CGItemp29258" user="GavinMurdoch" version="1" |
META FILEATTACHMENT |
attachment="Murdoch_Gavin_0900886_InterimReport.pdf" attr="" comment="Higgs Properties Interim Report" date="1360757170" name="Murdoch_Gavin_0900886_InterimReport.pdf" path="Murdoch_Gavin_0900886_InterimReport.pdf" size="88483" stream="Murdoch_Gavin_0900886_InterimReport.pdf" tmpFilename="/usr/tmp/CGItemp29110" user="GavinMurdoch" version="1" |
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